Just Pharmaceuticals not even all medicine is literally over half of all advertising spend in the US. And that is just the tip of the iceberg and doesn't go into the incestuous and conflicting interest relationships between pharma, pharmacies, medical providers and insurance companies all inter-invested in each-other to simply grow the pie larger since ACA limited profit percentages.

It's the single most powerful lobbying group as a whole, and nearly every politician is bought and paid for by them. Good luck getting a majority or super majority to work against them.